Animals And Their Importance Flashcards
What type of cells do animals consist of?
Eukaryotic cells
What are the two major groups of animals?
Invertebrates and vertebrates
How do animals obtain their nutrition?
Heterotrophic, relying on organic carbon sources
What is a defining characteristic of invertebrates?
Lack a vertebral column
Fill in the blank: Animals are classified as _______ if they live in their natural habitat.
Wild
Fill in the blank: Animals kept for benefits or as pets are termed _______.
Domestic
What is the significance of invertebrates in ecosystems?
Important part of food chains and ecosystem stability
What are the major groups of arthropods?
- Arachnids
- Crustaceans
- Insects
- Millipedes and centipedes
What type of body structure do mollusks have?
Soft bodies with hard shells
What are echinoderms characterized by?
Spiny skins and a water vascular system
True or False: All invertebrates are harmful to humans.
False
What type of respiration do amphibians utilize?
Gills, lungs, and cutaneous respiration
What are the three main characteristics of vertebrates?
- Notochord
- Nerve cord
- Pharyngeal slits
Fill in the blank: Fishes have a _______ chambered single circuit heart.
5
What type of skin do reptiles have?
Scaly skin
What is a unique feature of birds?
Fore arms modified into wings
What is the primary source of nutrition for mammals?
Milk (from mothers)
What are some benefits of vertebrates to humans?
- Protein foods (meat, eggs, milk)
- Furs and feathers
- By-products of fish industry
Fill in the blank: Some animals, like frogs and snakes, can be _______.
Poisonous
What role do earthworms play in soil fertility?
Decomposers that increase soil fertility
What are ectoparasites?
- Ticks
- Mites
- Lice
What is the primary role of parasites in ecosystems?
Can harm humans, domestic animals, and crops
True or False: Vertebrates are always endothermic.
True
What is the primary method of reproduction in amphibians?
Produce large number of eggs with no parental care
